package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.WebSocket.WebSocketServer;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cglib.core.Local;
import org.springframework.context.annotation.Bean;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收获地址为空、超出配送地址、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());
        //向订单表插入一条数据
        orderMapper.insert(order);
        //订单明细表
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList){
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);
        //清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);
        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     * @param ordersPaymentDTO
     * @return
     */
    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception{
        //当前登陆用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);
        //调用微信支付接口，生成预支付交易单
     /*   JSONObject jsonObject = weChatPayUtil.pay(ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01),  //支付金额，单位：元
                "苍穹外卖订单",   //商品描述
                user.getOpenid());   //微信用户的openid
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")){
            throw new OrderBusinessException("该订单已支付");
        }
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));*/
        // 5. 模拟支付成功的返回结果（替代微信支付的逻辑）
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");  // 设置支付成功的状态
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));  // 设置支付包信息

        // 6. 更新订单状态：将订单状态更新为已支付，待确认
        Integer OrderPaidStatus = Orders.PAID;  // 订单已支付状态
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  // 订单待确认状态
        LocalDateTime check_out_time = LocalDateTime.now();  // 当前时间作为结算时间
        String orderNumber = ordersPaymentDTO.getOrderNumber();  // 获取订单号

        // 7. 调用订单更新方法，将订单状态更新为已支付并待确认
        log.info("调用updateStatus，用于替换微信支付更新数据库状态的问题");  // 日志记录
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderNumber);  // 更新订单状态
        return vo;
    }

    /**
     * 订单支付成功
     * @param outTradeNo
     */
    @Override
    public void paySuccess(String outTradeNo) {
        //当前登陆用户id
        Long userId = BaseContext.getCurrentId();
        //根据订单号查询当前用户订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo,userId);
        //根据订单id更新订单状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);

        //通过WebSocket来推送消息，来单提醒
        Map map = new HashMap<>();
        map.put("type",1);
        map.put("orderId",orders.getId());
        map.put("content","订单号：" + outTradeNo);

        //通过WebSocket来实现来单提醒，向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
        log.info("来单提醒：{}",JSON.toJSONString(map));
    }

    /**
     * 查询历史订单，用户端订单分页查询
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery(Integer page, Integer pageSize, Integer status) {
        PageHelper.startPage(page,pageSize);
        Long userId = BaseContext.getCurrentId();
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(userId);
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> pageOrder = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList = new ArrayList<>();
        if (pageOrder != null && pageOrder.getTotal() > 0){
            for (Orders orders : pageOrder){
                Long orderId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }
        long total = pageOrder.getTotal();
        return new PageResult(total,orderVOList);
    }

    /**
     * 根据id查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO findDetailById(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 根据id取消订单
     * @param id
     */
    @Override
    public void cancelOrderById(Long id) {
        Orders orderMapperById = orderMapper.getById(id);
        if (orderMapperById == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (orderMapperById.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(orderMapperById.getId());
        if (orderMapperById.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            //调用微信支付退款接口进行退款
          /*  weChatPayUtil.refund(
                    orderMapperById.getNumber(), // 商户订单号
                    orderMapperById.getNumber(), // 商户退款单号
                    new BigDecimal(0.01), // 退款金额，单位为元
                    new BigDecimal(0.01)  // 原订单金额
            );*/
            orders.setStatus(Orders.REFUND);
        }
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x ->{
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 管理端订单搜索，分页查询订单
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(),orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO getOrderStatistics() {
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 将订单状态改为“已接单”
     */
    @Override
    public void comfrim(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .status(Orders.CONFIRMED)
                .id(ordersConfirmDTO.getId())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 将订单状态改为“已拒单”
     * @param ordersRejectionDTO
     */
    @Transactional
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Long id = ordersRejectionDTO.getId();
        Orders orders = orderMapper.getById(id);
        if (orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Integer payStatus = orders.getPayStatus();
        if (payStatus == Orders.PAID){
            log.info("申请退款操作....");
        }
        Orders build = Orders.builder()
                .id(orders.getId())
                .status(Orders.CANCELLED)
                .payStatus(Orders.REFUND)
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(build);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders.getStatus() == null && !orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders build = Orders.builder()
                .id(orders.getId())
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();
        orderMapper.update(build);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders.getStatus() == null && !orders.getStatus().equals(Orders.COMPLETED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders build = Orders.builder()
                .id(orders.getId())
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(build);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());
        Integer payStatus = orders.getPayStatus();
        if (payStatus == Orders.PAID){
            log.info("取消订单，退款！");
        }
        Orders build = Orders.builder()
                .id(ordersCancelDTO.getId())
                .status(Orders.CANCELLED)
                .payStatus(Orders.REFUND)
                .cancelReason(ordersCancelDTO.getCancelReason())
                .cancelTime(LocalDateTime.now())
                .build();
        orderMapper.update(build);
    }

    /**
     * 用户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //基于WebSocket实现用户催单
        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号：" + orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
        orderMapper.update(orders);
        log.info("用户催单...");
    }

    /**
     * 将Orders对象转换为OrderVO对象，并添加每个订单的菜品信息
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> page){
        List<Orders> ordersList = page.getResult();
        List<OrderVO> orderVOList = new ArrayList<>();
        for (Orders orders : ordersList){
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders,orderVO);
            String orderDishes = getOrderDishesStr(orders);
            orderVO.setOrderDishes(orderDishes);
            orderVOList.add(orderVO);
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders){
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        List<String> orderDishList = orderDetailList.stream().map(x ->{
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        return String.join("",orderDishList);
    }
}
